am: drop "dir" parameter from am_state_init

diff --git a/builtin/pull.c b/builtin/pull.c
index d6e46ee6d0054c152d721e92e354795c6f6002f8..d8032e838c63e4253d7ac544e52c331ec1751e77 100644 (file)
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -332,7 +332,7 @@ static int git_pull_config(const char *var, const char *value, void *cb)
  */
 static void get_merge_heads(struct sha1_array *merge_heads)
 {
-       const char *filename = git_path("FETCH_HEAD");
+       const char *filename = git_path_fetch_head();
        FILE *fp;
        struct strbuf sb = STRBUF_INIT;
        unsigned char sha1[GIT_SHA1_RAWSZ];
@@ -791,7 +791,7 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
        if (read_cache_unmerged())
                die_resolve_conflict("pull");
 
-       if (file_exists(git_path("MERGE_HEAD")))
+       if (file_exists(git_path_merge_head()))
                die_conclude_merge();
 
        if (get_sha1("HEAD", orig_head))
@@ -857,10 +857,24 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
                if (merge_heads.nr > 1)
                        die(_("Cannot merge multiple branches into empty head."));
                return pull_into_void(*merge_heads.sha1, curr_head);
-       } else if (opt_rebase) {
-               if (merge_heads.nr > 1)
-                       die(_("Cannot rebase onto multiple branches."));
+       }
+       if (opt_rebase && merge_heads.nr > 1)
+               die(_("Cannot rebase onto multiple branches."));
+
+       if (opt_rebase) {
+               struct commit_list *list = NULL;
+               struct commit *merge_head, *head;
+
+               head = lookup_commit_reference(orig_head);
+               commit_list_insert(head, &list);
+               merge_head = lookup_commit_reference(merge_heads.sha1[0]);
+               if (is_descendant_of(merge_head, list)) {
+                       /* we can fast-forward this without invoking rebase */
+                       opt_ff = "--ff-only";
+                       return run_merge();
+               }
                return run_rebase(curr_head, *merge_heads.sha1, rebase_fork_point);
-       } else
+       } else {
                return run_merge();
+       }
 }